#include <iostream>
#include <vector>
using namespace std;

int main(int argc, char const *argv[]) {
  vector<int> v(10);
  for (int i = 0; i < v.size(); ++i) {
    v[i] = i + 1;
  }
  for (auto it = v.begin(); it != v.end(); ++it) {
    (*it) *= 2;
  }
  for (auto it = v.begin(); it != v.end(); ++it) {
    cout << *it << endl;
  }
  return 0;
}
